Spraying apparatus.



UNITED STATES PATENT QFFTCE.

ANTENOR SALA, OF MEXICO, MEXICO.

SPRAYIN'G APPARATUS.

To all whom it may concern:

Be it known that I, AN'rENon SALA, a citizen oi' the l? epublic oi"Mexico, residing at the city of Mexico, Republic of Mexico, haveinvented certain new and useful Improvements in bprayinu Apparatus, ofwhich the following is a specificz'ttion.

This invention relates to an apparatus for spraying paints or othermaterials by means of a compact and easily transportable apparatus whichmay be operated by hand. Its object is to provide an apparatus of thissort which can be continuously charged and operated, and ,by means ofwhichthe spraying may be done at any desired pressure and this pressuremaintained continuously uniform and constant.

One form of apparatus which I may use for this purpose is shown in crosssection in the accompanying drawing forming part of this specification.It consists of a receptacle 1 provided with a perforated or sieve-likediaphragm 2, through which the paint or other material may be percolatedand sifted. 3 is an ordinary pump (shown inclosed in the receptacle 1for economy of space) and having its piston rod 4 connected with a lever5 ful crumed to a bracket 6 on the receptacle. The paint or othermaterial to be sprayed, which has been first sifted or strained throughthe perforated diaphragm 2 into ,the receptacle 1, is shown at 7. Thisstrained material is adapted to be forced through a tube 8 from saidpump with which it is connocted, into an air tight tank or receiver 9.This tube 8 is provided with an ordinary check valve 10, and also has acock. 11, near the tank 9. This tank has previously been charged withcompressed air, whichcharging may take place by means of an-air pump 12,and which may be as shown within said tank. This compression of airshould be carried to a point somewhat lower than the desired workingpressure, and which will be indicated by the pressure gage '13, on saidtank. The material is then pumped into the tank (see 111') until thedesired working pressure is obtained; and this pressure will beindicated by the pressure gage l.

15 is a pi pc or hose, oi any desired length, leading from the bottom ofthe tank 9 and provided with a.cock1o, and'a spraying device 17. Whenthe cock 16 is opened, the paint or other material is allowed to flowSpecification of Letters Patent.

Application filed. March 16.

' nozzle 17.

Patented June 8, 1909. 1907. Serial No. 362,623.

I through the pipe or hose 15, being forced therethrough by thecompressed air in the tank 9. The paint or other material then issuesfrom the nozzle or spraying device 17,

which may be of any suitable form, but is one preferably consisting of aplate 18, provided with a small hole or orifice 19. This nozzle orspraying device is not"an essential feature of my invention. The checkvalve 10 controls the passage of the material from the receptacle 1 tothe tank 9.

It should be understood that the air in the tank 9, being at the startcompressed to a suitable pressure, does not issue from the said tank atl6'togethcr with the paint or material to be sprayed, but is behind saidmaterial, forcing it through the pipe 15 and The pressure in the saidtank is maintained at the desired working pressure, as indicated by thepressure gage 13, by continuously pumping the material into the tank 9,by means of the force pump 3. By observing the pressure gage, the paintor other material can be pumped or "forced into the tank 9 at a rateapproximately equalto that which it leaves through the outlet andnozzle, and the pressure be thus maintained. This regulation of the rateof forcing the material into the tank 9 may also be done automaticallyby any suitable device, for example by ohe which controls the speed ofthe force pump, or by one which returns thd composition to thereceptacle when the necessary pumping speed is exceeded.

The regulation of the force of the material, which is pumped into thetank 9 to keep the pressure in said tank constant, may be accomplishedautomatically by means of an automatic valve connected with the pipe 8.In the drawing is shown an elbow pipe, one arm 20 of which is'conne'ctedwith said pipe back of the stop cook 11, and the other arm 21 beingconnected with the receptacle 1. In the elbow 'oining the arms 20 and 21is an automatic vaive 22 controlled by aspring 23, the stem of the valvepassing loosely through a nut 24, which is screwed into casing 25, thepressure of the spring against the valve bemg regulated by screwing thenut injeither direction. The automatic Valve performs no function unlessthe passage way through pipe 8 is open. he mechanism above described canbe used With or without check valve 10, the check valve 10 being alwaysopen, while it is desired that the automatic valve performs its properfunctions. During the operation of the apparatus, as long as thepressure in the tank 9 does not exceed that for which the valve has beenregulated, the material willbe pumped from the receptacle -1 through thepipe 8 into the'tank 9. As soon, however, as the desired workingpressure is exceeded, which will be enough to force the valve 22 againstthe action of the spring, said valve will open and the material willflow back through the pipe 21 in to the receptacle 1. As long as theabove described valve and its connected mechanism is in order, andduring the operation of the fapparatus, all valves and cocks in the pipe8 may remain open and the material can flow from the receptacle 1 intothe air tight tank 9, when and only when the pressure therein fallsbelow the desired working pressure. At all other times, that is,whenever the desired work'ng pressure is exceeded, the material will owback into the receptacle 1.

26 is a stop cock in the pipe 8 between the check valve 10 and the elbowarm 20. 27 is a discharge outlet in the bottom of the re ceptacle 1,which is controlled by a cook 28, and 29 is a=discharge outlet in thepipe 8 be tween the cook 25 and the elbow arm 20 controlled by cock 30.In order to clear out the entire apparatus after using it for paintingor spraying, or justbefore it is to be used for such urpose, the cook 26should. be closed and t e cook 28 opened, and the material from thereceptacle 1 is permitted to discharge through the outlet 27. Water orcleansing material can be used also to clean the receptacle 1, and bedischarged through the outlet 27. The cock 30 is opened. when the paintor other material remaining in the pipe 8 is to be discharged or drawnofi' through said pi e, and it is evident that water or other e eansingmaterial from the receptacle 1 may be forced into pipe 8v and bedischarged and .drawn off from the outlet 29. In the beginning of theoperation of the apparatus the cock 30 should be opened until anymaterial that has remained in the pipe 8 has discharged through theoutlet 29. As soon as this discharge ceases, the cook 30 should beclosed so as td prevent the escape of any compressed air that may be inthe tank 9. Of course when the machine begins to be operated and whenthe material is laced in the receptacle 1 the valve 28 must be closed,and the cocks l1 and 26 must be open.

31 is a stop cock in the pipe 15, which may be applied at any desiredpoint on said pipe to enable the operatorhandling the spraying end ofthe apparatus to shut oil or open the passage way for the material ofthe spraying device Whenever desired.

From the above it will be seen that my-invention provides means forsprayingpaints .hand andwork the pump 3 with the other and at the sametime keep the proper pressure on the liquid and be in a position toopcrate the various valves and see whether the tank 1 is nearly empty.if the )ump '3 was in almost any other position these advantageswould'not be obtained. Prior devices have been found disadvantageous inthis respect.

1 do not limit myself to the precise construction herein described andshown, as many changes may be made therein without sacrilicing'i tschiel advantages.

by Letters Patent, is:

1;' A spraying apparatus consisting of an air tight tank, meansconnected with said tank for supplying compressed air to the same, aninlet to said tank, means for forcing the liquid or other materialthrough said in let and into said tank, an outlet for said-mm terialfrom said tank and communi ating with the spraying nozzle, means forindicating the pressure on said material, and means for automaticallyregulating said pressure on said material, whereby it may becontinuously sprayed and under a oonstant,-uniform and desired pressure.

2. A spraying apparatus comprising a receptacle-for thcmaterial to besprayed, an. airtight tank, and a passageway between said receptacle andtank for said material, an air pump connected with said tank forsupplying compressed air to the same, a force pump having its cylinderinclosed within said receptacle for forcing the material through saidpassageway and into said tank, an outlet passage leading from said tankfor the material, and terminating at the ejecting outlet.

3. A spraying apparatus comprising a receptacle for the material to besprayed, an air tight tank, and a passageway between said receptacle andtank for said-material, an air ump having its cylinder inclosed in saidtank for supplying compressed air to the same, a forcepump-havmg its clindcr inclosed within said receptacle for orcing the material throughsaid passageway and into causing troublesome erator may use t 1e sprayinnozzle with one departing from the, spirit of iny invention or 1; i' i.e c ,si'c osezurclat i claim as 11 u and lo 1 t t said tank, an outletassage leading from said tank for the materia and terminating at theejecting outlet.

4. A spraying apparatus comprising a receptacle for the material to besprayed, an

air tight tank, and a passageway between said receptacle and tank forsaid material, an air pump connected with said tank for supplyingcompressed air to the same, a force pump having its cylinder inclosedwithin said receptacle for forcing the material through said passagewayand into said tank, an outlet passage leading from said tank for thematerial, and terminating at the ejecting outlet, and means forautomatically regulatin" the pressure on the material in the tank.

a. A sprayingapparatus comprising a receptacle for the material to besprayed, an air tight tank, and a )assageway between said receptacle andtan for said material, a plurality oi slop-reeks and a discharge valvear- .ranged in said passageway, an air pump having its cylinder inelosedin said tank for supplying compressed air to the same, a force pumphaving its cylinder inclosed within said receptacle for forcing thematerial I through said passageway and into said tank,

an outlet passage leading from said. tank for the material, andtermlnating at the ejecting outlet, and means for automaticallyregulating the pressure on the material in the tank.

6. spraying apparatus consisting ofan air tight tank, an air pump havingits cylinder inclosed within said tank, a receptaclefor the material tobe sprayed, a force pump having its cylinder lnclosed within saidreeeptacle, a passageway leading directly from said pump cylinder tosaid tank, an ejecting outlet from said tank and spring actuated

